Which of the following sentences has a forceful tone?
think it over!

i hope you will think it over.

i was wondering if you have had time to think it over.

would you be so kind as to think over what i said?

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

wow there were a thousand people in the concert. that’s great